204442440445 has 4 divisors (see below), whose sum is σ = 245330928540. Its totient is φ = 163553952352.

The previous prime is 204442440427. The next prime is 204442440451. The reversal of 204442440445 is 544044244402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128959273881 + 75483166564 = 359109^2 + 274742^2 .

It is a cyclic number.

It is not a de Polignac number, because 204442440445 - 2²⁵ = 204408886013 is a prime.

It is a super-2 number, since 2×204442440445² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20444244040 + ... + 20444244049.

It is an arithmetic number, because the mean of its divisors is an integer number (61332732135).

Almost surely, 2^204442440445 is an apocalyptic number.

It is an amenable number.

204442440445 is a deficient number, since it is larger than the sum of its proper divisors (40888488095).

204442440445 is an equidigital number, since it uses as much as digits as its factorization.

204442440445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40888488094.

The product of its (nonzero) digits is 327680, while the sum is 37.

Adding to 204442440445 its reverse (544044244402), we get a palindrome (748486684847).

The spelling of 204442440445 in words is "two hundred four billion, four hundred forty-two million, four hundred forty thousand, four hundred forty-five".